What is correct from this traffic sign onwards?

This traffic sign means "No entry for vehicles of any kind" (Verbot für Fahrzeuge aller Art). From this sign onward, you are not allowed to ride or drive any motorized vehicle. However, you are allowed to push your motorized bicycle, because pushing a vehicle does not count as driving. That's why the answer "You may push your motorized bicycle" is correct, but driving or coasting with the engine off is not allowed. This rule helps ensure that the road stays free of motor vehicle traffic for safety or environmental reasons.